All disks sit on the same controller /devices/pci@0,0/pci1022,7458@1/pci11ab,11ab@1

When looking on the partitioning information with hd -a, almost all disks except the boot disks were labelled "none" in the fdisk type information. c0t0d0p0 was labelled as LinuxNative Solaris (probably somebody had done some test installs on this machine). I set up ZFS on all disks (using our t3 ZFS script), and afterwards all disks were labelled as "EFI".

I used format, selected the disks, and then used the backup option as suggested by the tool. Thereafter hd -a showed the disks correctly again with the EFI label.

connection and DNS resolve problems

Connecting to t3fs05 via ssh was extremely slow, and t3fs05 was unable to resolve hostnames via the name server. The configuration looked fine. The problem was that the switch already was configured for the bonded interfaces, but the machine only used the e1000g0 interface.

After aggregating the interfaces, everything was fine.

t3fs01 unkillable java process problem and patching

Jobs from a user had left 56 connections in CLOSE_WAIT on the t3fs01_cms pool.
I tried to issue mover kill on the matching movers in the pool cell. After the first such command, the pool got stuck.
Shutting the dcache down on this fileserver failed to stop the t3fs01 domain process. The process could not be killed even when sending SIGKILL and continued to occupy its resources.

The only way to get rid of the problem was to reboot the system.

The reboot triggered a number of patches which seemingly had been "lying in waiting"... Luckily this did not cause any boot problems